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  5. Category I65
Category I65

Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

Clinical Classification Guidelines

Specific Diagnosis Codes

Occlusion and stenosis of vertebral artery
I65.0
Occlusion and stenosis of right vertebral artery
I65.01
Occlusion and stenosis of left vertebral artery
I65.02
Occlusion and stenosis of bilateral vertebral arteries
I65.03
Occlusion and stenosis of unspecified vertebral artery
I65.09
Occlusion and stenosis of basilar artery
I65.1
Occlusion and stenosis of carotid artery
I65.2
Occlusion and stenosis of right carotid artery
I65.21
Occlusion and stenosis of left carotid artery
I65.22
Occlusion and stenosis of bilateral carotid arteries
I65.23
Occlusion and stenosis of unspecified carotid artery
I65.29
Occlusion and stenosis of other precerebral arteries
I65.8
Occlusion and stenosis of unspecified precerebral artery
I65.9
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Data updated for October 2025 release.

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